Re: Choice of long range test loads based on overall group size or vertical group siz
I loaded some up at 39.0gr and shot an informal 600 yard match.
Load data changed slightly, as I had some issues with neck sizing related in another post I made.
Once fired brass, neck sized in a Wilson neck sizer with a 0.285" bushing, spring back got me 0.286" necks vs the 0.2875" of the new brass. So the neck tension was different. But the other variables stayed the same: COAL 2.800", 130gr bergers, FED205M, 39.0gr of H4350.
We used 300 yard high power slow fire targets at 600.
Shot 2 sighters and 20 record. Shot a 197-5x. The nines were me mucking it up (shot prone off sand bags that weren't great, the Caldwell dead shot bags, with fogging sunglasses as the sun set).
Was still fiddling with the scope a bit through the 20 shots, but once I left it alone, the group settled down and 12 shots were in a group 2" high by 5" wide. I'll have to see next Tuesday how I shoot when I have the gun zeroed and maybe use a better rest system...
PS. I don't have a chronograph or access to one right now...could someone tell me an estimate of my velocity? From a 100 yard zero, it took 14.25MOA to a 600 yard zero. Thanks.